Removing the VIM browse patch.

The general reasoning is that the vim browse patch is very invasive,
has a high level of complexity, and is incompatible with a significant
number of other patches and it complicates further maintenance.

Additionally the patch has its own scrollback mechanism which seemingly
did not work properly - and nobody seems to have complained about this
since the patch was added back in May 2021.

If you want to try out the vim browse patch then I would recommend having
a play around with the patch author's own build that has this patch
integrated:
   - https://github.com/juliusHuelsmann/st-history-vim
   - https://github.com/juliusHuelsmann/st

Alternatively a tag has been added to this repository that refers to the
last commit that still has the vim browse patch:
   - https://github.com/bakkeby/st-flexipatch/tree/VIM_BROWSE_PATCH

patch/st_include.h

@@ -26,6 +26,3 @@
 #if SYNC_PATCH
 #include "sync.h"
 #endif
-// #if VIM_BROWSE_PATCH
-// #include "normalMode.h"
-// #endif