Remove blank line before the end of some structs

(cherry picked from commit efe764b492)

src/cocoa_platform.h

@@ -135,7 +135,6 @@ typedef struct _GLFWwindowNS
     // since the last cursor motion event was processed
     // This is kept to counteract Cocoa doing the same internally
     double          cursorWarpDeltaX, cursorWarpDeltaY;
-
 } _GLFWwindowNS;
 
 // Cocoa-specific global data
@@ -170,7 +169,6 @@ typedef struct _GLFWlibraryNS
         PFN_LMGetKbdType GetKbdType;
         CFStringRef     kPropertyUnicodeKeyLayoutData;
     } tis;
-
 } _GLFWlibraryNS;
 
 // Cocoa-specific per-monitor data
@@ -182,7 +180,6 @@ typedef struct _GLFWmonitorNS
     uint32_t            unitNumber;
     id                  screen;
     double              fallbackRefreshRate;
-
 } _GLFWmonitorNS;
 
 // Cocoa-specific per-cursor data
@@ -190,7 +187,6 @@ typedef struct _GLFWmonitorNS
 typedef struct _GLFWcursorNS
 {
     id              object;
-
 } _GLFWcursorNS;
 
 // Cocoa-specific global timer data
@@ -198,7 +194,6 @@ typedef struct _GLFWcursorNS
 typedef struct _GLFWtimerNS
 {
     uint64_t        frequency;
-
 } _GLFWtimerNS;