Don't check comp-buffer-name-function in derived mode (Bug#34956)

Don't check comp-buffer-name-function in derived mode (Bug#34956)

* lisp/progmodes/compile.el (define-compilation-mode): Remove
'compilation-buffer-name-function' from the list of overridden
variables to ensure that it is not mistaken for a variable that can be
major mode specific.  'compilation-buffer-name-function' is used
before the major mode is loaded, therefore overriding it here is
ineffectual.  Also, the function 'compilation-start' takes an optional
argument name-function, so there is already a mechanism to override
it.