eliminate some old win32 timer code; use LLD in clang builds; eliminate unnecessary Clang architecture flags; eliminate /MP from builds, since mostly unnecessary

src/os/gfx/os_gfx.h

@@ -152,7 +152,6 @@ internal void           os_set_cursor(OS_Cursor cursor);
 internal F32            os_double_click_time(void);
 internal F32            os_caret_blink_time(void);
 internal F32            os_default_refresh_rate(void);
-internal B32            os_granular_sleep_enabled(void);
 
 ////////////////////////////////
 //~ rjf: @os_hooks Native Messages & Panics (Implemented Per-OS)

src/os/gfx/win32/os_gfx_win32.c

@@ -14,7 +14,6 @@ global Arena *        w32_event_arena = 0;
 global HCURSOR        w32_hcursor = 0;
 global B32            w32_resizing = 0;
 global F32            w32_default_refresh_rate = 60.f;
-global B32            w32_granular_sleep_enabled = 0;
 
 ////////////////////////////////
 //~ allen: Windows SDK Inconsistency Fixer
@@ -585,9 +584,6 @@ os_graphical_init(void)
     }
   }
   
-  //- rjf: try to enable granular sleep
-  w32_granular_sleep_enabled = (timeBeginPeriod(1) == TIMERR_NOERROR);
-  
   //- rjf: set initial cursor
   os_set_cursor(OS_Cursor_Pointer);
 }
@@ -1081,12 +1077,6 @@ os_default_refresh_rate(void)
   return w32_default_refresh_rate;
 }
 
-internal B32
-os_granular_sleep_enabled(void)
-{
-  return w32_granular_sleep_enabled;
-}
-
 ////////////////////////////////
 //~ rjf: @os_hooks Native Messages & Panics (Implemented Per-OS)
 

src/os/gfx/win32/os_gfx_win32.h

@@ -6,7 +6,6 @@
 
 #pragma comment(lib, "user32")
 #pragma comment(lib, "gdi32")
-#pragma comment(lib, "winmm")
 
 ////////////////////////////////
 //~ rjf: Windows