We don't need to flush DCache when launching payloads.

Fixes a derp as well.

loader/source/memory.h

@@ -2,14 +2,4 @@
 
 #include "types.h"
 
-void memcpy(void *dest, const void *src, u32 size);
-
-/***
-    Cleans and invalidates the data cache, then waits for all memory transfers to be finished.
-    This function MUST be called before doing the following:
-        - rebooting
-        - powering down
-        - setting the ARM11 entrypoint to execute a function
-        - jumping to a payload (?)
-***/
-void cleanInvalidateDCacheAndDMB(void);
+void memcpy(void *dest, const void *src, u32 size);