removed manager field from bounty schema

A user added a field which isn't specified in the current schema.

bounties/bounties-status.json

@@ -202,7 +202,6 @@
       "title": "Github Bounty Guide",
       "openedDate": "2021-07-04",
       "description": "Create a short video guide explaining how to use GitHub for submitting your bounty work.",
-      "managers": ["@isonar"],
       "links": ["https://testnet.joystream.org/#/forum/threads/492","https://github.com/Joystream/community-repo/issues/220"],
       "reward": 350,
       "notes": "Create GitHub video guides",
@@ -219,7 +218,6 @@
       "title": "Repo/Docs Improvements",
       "description": "Improve the quality of our documentation on GitHub, by making PRs and issues.",
       "openedDate": "2021-02-15",
-      "managers": ["@ilich"],
       "links": ["https://testnet.joystream.org/#/forum/threads/216","https://github.com/Joystream/community-repo/issues/87"],
       "reward": 300,
       "tags": ["Newcomers","Research"],
@@ -231,7 +229,6 @@
       "title": "Translating Update Videos",
       "openedDate": "2021-04-10",
       "description": "Translate Community Updates videos to non-English languages.",
-      "managers": ["@mmsaww"],
       "links": ["https://testnet.joystream.org/#/forum/threads/510","https://github.com/Joystream/community-repo/issues/144"],
       "reward": 400,
       "notes": "Translate Joystream Community Updates videos",
@@ -244,7 +241,6 @@
       "title": "Original Video Bounty",
       "openedDate": "2021-05-29",
       "description": "Create and upload original videos on Joystream",
-      "managers": ["@joydiesel"],
       "links": ["https://testnet.joystream.org/#/forum/threads/422","https://github.com/Joystream/community-repo/issues/162"],
       "reward": 200,
       "notes": "Create and upload original videos on Joystream",
@@ -257,7 +253,6 @@
       "title": "Website Translation",
       "openedDate": "2021-06-28",
       "description": "Translate the joystream.org website to languages other than English.",
-      "managers": ["@freakstatic_council"],
       "links": ["https://testnet.joystream.org/#/forum/threads/493","https://github.com/Joystream/community-repo/issues/212"],
       "reward": 500,
       "notes": "Translate the Joystream website",
@@ -270,7 +265,6 @@
       "title": "KPIs Web UI",
       "openedDate": "2021-04-10",
       "description": "Create a UI for the council's KPIs.",
-      "managers": ["@isonar"],
       "links": ["https://testnet.joystream.org/#/forum/threads/510","https://github.com/Joystream/community-repo/issues/280"],
       "reward": 250,
       "notes": "Create a UI for the council's KPIs.",
@@ -283,7 +277,6 @@
       "title": "Runtime Update Explanation",
       "openedDate": "2021-08-14",
       "description": "Create an explanation of what a runtime upgrade can do",
-      "managers": ["@tomato"],
       "links": ["https://testnet.joystream.org/#/forum/threads/541","https://github.com/Joystream/community-repo/issues/289"],
       "reward": 65,
       "notes": "Runtime Update Explanation",
@@ -296,7 +289,6 @@
       "title": "Upload Content",
       "openedDate": "2021-10-01",
       "description": "Upload public domain and Creative Commons videos",
-      "managers": ["@arsstep"],
       "links": ["https://testnet.joystream.org/#/forum/threads/623","https://github.com/Joystream/community-repo/issues/295"],
       "reward": 300,
       "notes": "Upload public domain videos",
@@ -309,7 +301,6 @@
       "title": "Superstar Blogger Competition",
       "openedDate": "2021-10-01",
       "description": "Upload original videos",
-      "managers": ["@Millionchic1", "mmm"],
       "links": ["https://discord.com/channels/811216481340751934/886135291847520276","https://github.com/Joystream/community-repo/issues/311"],
       "reward": 400,
       "notes": "Upload original videos",
@@ -322,7 +313,6 @@
       "title": "JS + Other Platform Videos",
       "openedDate": "2021-10-01",
       "description": "Create Promo Videos for JS",
-      "managers": ["katerlna"],
       "links": ["https://testnet.joystream.org/#/forum/threads/594","https://github.com/Joystream/community-repo/issues/342"],
       "reward": 500,
       "notes": "Upload original videos",
@@ -335,7 +325,6 @@
       "title": "JS Official Music Theme",
       "openedDate": "2021-10-01",
       "description": "Create a musical theme for Joystream",
-      "managers": [],
       "links": ["https://testnet.joystream.org/#/proposals/606","https://github.com/Joystream/community-repo/issues/384"],
       "reward": 400,
       "notes": "Musical Theme",