chore: remove unneeded context helpers

Author: G-Rath

src/context.js

@@ -1,19 +1,3 @@
-export function getFilename(context) {
-  if ('filename' in context) {
-    return context.filename;
-  }
-
-  return context.getFilename();
-}
-
-export function getPhysicalFilename(context) {
-  if (context.getPhysicalFilename) {
-    return context.getPhysicalFilename();
-  }
-
-  return getFilename(context);
-}
-
 export function getSourceCode(context) {
   if ('sourceCode' in context) {
     return context.sourceCode;
@@ -31,23 +15,3 @@ export function getScope(context, node) {
 
   return context.getScope();
 }
-
-export function getAncestors(context, node) {
-  const sourceCode = getSourceCode(context);
-
-  if (sourceCode && sourceCode.getAncestors) {
-    return sourceCode.getAncestors(node);
-  }
-
-  return context.getAncestors();
-}
-
-export function getDeclaredVariables(context, node) {
-  const sourceCode = getSourceCode(context);
-
-  if (sourceCode && sourceCode.getDeclaredVariables) {
-    return sourceCode.getDeclaredVariables(node);
-  }
-
-  return context.getDeclaredVariables(node);
-}