Remove some explicit runtime loads of pcase

Pcase is macros, so these should have used eval-when-compile.
Anyway, pcase entry points are autoloaded, so the compiler handles it.
* lisp/profiler.el, lisp/emacs-lisp/eieio-core.el:
* lisp/emacs-lisp/generator.el, lisp/emacs-lisp/subr-x.el:
* lisp/progmodes/xref.el: No need to require pcase.

lisp/emacs-lisp/eieio-core.el

@@ -32,7 +32,6 @@
 ;;; Code:
 
 (require 'cl-lib)
-(require 'pcase)
 (require 'eieio-loaddefs nil t)
 
 ;;;

lisp/emacs-lisp/generator.el

@@ -77,7 +77,6 @@
 ;;; Code:
 
 (require 'cl-lib)
-(require 'pcase)
 
 (defvar cps--bindings nil)
 (defvar cps--states nil)

lisp/emacs-lisp/subr-x.el

@@ -35,7 +35,6 @@
 
 ;;; Code:
 
-(require 'pcase)
 (eval-when-compile (require 'cl-lib))
 
 

lisp/profiler.el

@@ -27,7 +27,6 @@
 ;;; Code:
 
 (require 'cl-lib)
-(require 'pcase)
 
 (defgroup profiler nil
   "Emacs profiler."

lisp/progmodes/xref.el

@@ -69,7 +69,6 @@
 (require 'cl-lib)
 (require 'eieio)
 (require 'ring)
-(require 'pcase)
 (require 'project)
 
 (eval-when-compile