Revert "Fix: Add Parenthesis around if-statement in macro (#138)" (#148)

This reverts commit 45e97bd246e115ca9ebdd6538939478c6c6e6343.
diff --git a/portable/GCC/ARM_CM4F/portmacro.h b/portable/GCC/ARM_CM4F/portmacro.h
index 173c7cb..ebc9643 100644
--- a/portable/GCC/ARM_CM4F/portmacro.h
+++ b/portable/GCC/ARM_CM4F/portmacro.h
@@ -90,12 +90,7 @@
 

     #define portNVIC_INT_CTRL_REG     ( *( ( volatile uint32_t * ) 0xe000ed04 ) )

     #define portNVIC_PENDSVSET_BIT    ( 1UL << 28UL )

-

-    #define portEND_SWITCHING_ISR( xSwitchRequired )        \

-        do {                                                \

-            if( (xSwitchRequired) != pdFALSE ) portYIELD(); \

-        } while (0)

-

+    #define portEND_SWITCHING_ISR( xSwitchRequired )    if( xSwitchRequired != pdFALSE ) portYIELD()

     #define portYIELD_FROM_ISR( x )                     portEND_SWITCHING_ISR( x )

 /*-----------------------------------------------------------*/