Remove unused .patch files

scripts/limits.patch

Index: scripts/limits.patch
===================================================================
--- scripts/limits.patch	(revision 81227)
+++ scripts/limits.patch	(working copy)
@@ -1,39 +0,0 @@
-Index: include/pub_tool_threadstate.h
-===================================================================
---- include/pub_tool_threadstate.h	(revision 11055)
-+++ include/pub_tool_threadstate.h	(working copy)
-@@ -36,7 +36,11 @@
-    scheduler algorithms is surely O(N) in the number of threads, since
-    that's simple, at least.  And (in practice) we hope that most
-    programs do not need many threads. */
-+#if defined(VGO_darwin)
- #define VG_N_THREADS 500
-+#else
-+#define VG_N_THREADS 10000
-+#endif
- 
- /* Special magic value for an invalid ThreadId.  It corresponds to
-    LinuxThreads using zero as the initial value for
-Index: coregrind/m_aspacemgr/aspacemgr-linux.c
-===================================================================
---- coregrind/m_aspacemgr/aspacemgr-linux.c	(revision 11055)
-+++ coregrind/m_aspacemgr/aspacemgr-linux.c	(working copy)
-@@ -265,10 +265,18 @@
- /* ------ start of STATE for the address-space manager ------ */
- 
- /* Max number of segments we can track. */
-+#if defined(VGO_darwin)
- #define VG_N_SEGMENTS 5000
-+#else
-+#define VG_N_SEGMENTS 100000
-+#endif
- 
- /* Max number of segment file names we can track. */
-+#if defined(VGO_darwin)
- #define VG_N_SEGNAMES 1000
-+#else
-+#define VG_N_SEGNAMES 100000
-+#endif
- 
- /* Max length of a segment file name. */
- #define VG_MAX_SEGNAMELEN 1000