fix: f, g, and h no longer impact behavior of /

Removes special treatment of f, g, and h as implicit functions. Main side affect was that divide command worked different for variables containing f, g, or h compared to those without f, g, or h

fixes arnog#1869

src/core-definitions/definitions-utils.ts

@@ -922,17 +922,6 @@ export function getDefinition(
     };
   }
 
-  // Special case `f`, `g` and `h` are recognized as functions.
-  if (
-    info &&
-    info.definitionType === 'symbol' &&
-    info.type === 'mord' &&
-    (info.codepoint === 0x66 ||
-      info.codepoint === 0x67 ||
-      info.codepoint === 0x68)
-  )
-    info.isFunction = true;
-
   return info ?? null;
 }