feat: remove more of dead code.

Author: khaledalam

Zend/zend_alloc.c

@@ -1480,7 +1480,6 @@ static zend_always_inline void *zend_mm_alloc_heap(zend_mm_heap *heap, size_t si
 	size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
 	if (UNEXPECTED(size < real_size)) {
 		zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu + %zu)", ZEND_MM_ALIGNED_SIZE(real_size), ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
-		return NULL;
 	}
 #endif
 	if (EXPECTED(size <= ZEND_MM_MAX_SMALL_SIZE)) {

Zend/zend_compile.c

@@ -11485,7 +11485,6 @@ static void zend_compile_const_expr_class_name(zend_ast **ast_ptr) /* {{{ */
 		case ZEND_FETCH_CLASS_STATIC:
 			zend_error_noreturn(E_COMPILE_ERROR,
 				"static::class cannot be used for compile-time class name resolution");
-			return;
 		EMPTY_SWITCH_DEFAULT_CASE()
 	}
 }

Zend/zend_execute_API.c

@@ -1565,7 +1565,6 @@ static void zend_set_timeout_ex(zend_long seconds, bool reset_signals) /* {{{ */
 		if (!DeleteTimerQueueTimer(NULL, tq_timer, INVALID_HANDLE_VALUE)) {
 			tq_timer = NULL;
 			zend_error_noreturn(E_ERROR, "Could not delete queued timer");
-			return;
 		}
 		tq_timer = NULL;
 	}
@@ -1575,7 +1574,6 @@ static void zend_set_timeout_ex(zend_long seconds, bool reset_signals) /* {{{ */
 	if (!CreateTimerQueueTimer(&tq_timer, NULL, (WAITORTIMERCALLBACK)tq_timer_cb, (VOID*)eg, seconds*1000, 0, WT_EXECUTEONLYONCE)) {
 		tq_timer = NULL;
 		zend_error_noreturn(E_ERROR, "Could not queue new timer");
-		return;
 	}
 #elif defined(ZEND_MAX_EXECUTION_TIMERS)
 	if (seconds > 0) {
@@ -1662,7 +1660,6 @@ void zend_unset_timeout(void) /* {{{ */
 			zend_atomic_bool_store_ex(&EG(timed_out), false);
 			tq_timer = NULL;
 			zend_error_noreturn(E_ERROR, "Could not delete queued timer");
-			return;
 		}
 		tq_timer = NULL;
 	}