Remove local apollo query and mutation for commit sha

app/assets/javascripts/pipeline_editor/graphql/mutations/update_commit_sha.mutation.graphql

-mutation updateCommitSha($commitSha: String) {
-  updateCommitSha(commitSha: $commitSha) @client
-}

app/assets/javascripts/pipeline_editor/graphql/queries/client/commit_sha.graphql

-query getCommitSha {
-  commitSha @client
-}

app/assets/javascripts/pipeline_editor/graphql/resolvers.js

 import produce from 'immer';
 import axios from '~/lib/utils/axios_utils';
-import getCommitShaQuery from './queries/client/commit_sha.graphql';
 import getCurrentBranchQuery from './queries/client/current_branch.graphql';
 import getLastCommitBranchQuery from './queries/client/last_commit_branch.query.graphql';
 
@@ -32,14 +31,6 @@ export const resolvers = {
         __typename: 'CiLintContent',
       }));
     },
-    updateCommitSha: (_, { commitSha }, { cache }) => {
-      cache.writeQuery({
-        query: getCommitShaQuery,
-        data: produce(cache.readQuery({ query: getCommitShaQuery }), (draftData) => {
-          draftData.commitSha = commitSha;
-        }),
-      });
-    },
     updateCurrentBranch: (_, { currentBranch }, { cache }) => {
       cache.writeQuery({
         query: getCurrentBranchQuery,