Enable more eslint recommended rules (#11168)

* chore: enable no-constant-condition

* chore: enable no-empty rule

* chore: enable no-unreachable

* chore: enable no-cond-assign

* chore: enable no-inner-declarations

* chore: remove disabled rules that are not in eslint:recommended

* fix: oops

packages/babel-traverse/src/path/comments.js

@@ -20,10 +20,9 @@ export function shareCommentsWithSiblings() {
   const next = this.getSibling(this.key + 1);
   const hasPrev = Boolean(prev.node);
   const hasNext = Boolean(next.node);
-  if (hasPrev && hasNext) {
-  } else if (hasPrev) {
+  if (hasPrev && !hasNext) {
     prev.addComments("trailing", trailing);
-  } else if (hasNext) {
+  } else if (hasNext && !hasPrev) {
     next.addComments("leading", leading);
   }
 }

packages/babel-traverse/src/scope/lib/renamer.js

@@ -62,6 +62,7 @@ export default class Renamer {
 
     // retain the `name` of a class/function declaration
 
+    // eslint-disable-next-line no-unreachable
     if (!path.isFunctionDeclaration() && !path.isClassDeclaration()) return;
     if (this.binding.kind !== "hoisted") return;
 
@@ -83,6 +84,7 @@ export default class Renamer {
 
     // retain the `name` of a class/function expression
 
+    // eslint-disable-next-line no-unreachable
     if (!path.isFunctionExpression() && !path.isClassExpression()) return;
     if (this.binding.kind !== "local") return;