Remove disabled ESLint rules without linting errors

This removes some ESLint rules that do not give any linting errors when
removing the rule overrides from the config file. This could be because
there are no instances of the rule being violated, or because the rule
is already disabled by some other configuration.

extensions/ql-vscode/.eslintrc.js

@@ -31,7 +31,6 @@ const baseConfig = {
   ],
   rules: {
     "@typescript-eslint/await-thenable": "error",
-    "@typescript-eslint/no-use-before-define": 0,
     "@typescript-eslint/no-unused-vars": [
       "warn",
       {
@@ -40,9 +39,6 @@ const baseConfig = {
         ignoreRestSiblings: false,
       },
     ],
-    "@typescript-eslint/explicit-function-return-type": "off",
-    "@typescript-eslint/explicit-module-boundary-types": "off",
-    "@typescript-eslint/no-non-null-assertion": "off",
     "@typescript-eslint/no-explicit-any": "off",
     "@typescript-eslint/no-floating-promises": ["error", { ignoreVoid: true }],
     "@typescript-eslint/no-invalid-this": "off",