fish: Remove no longer needed patch

packages/fish/common.cpp.patch

@@ -1,16 +0,0 @@
-diff -u -r ../fish-shell-master/src/common.cpp ./src/common.cpp
---- ../fish-shell-master/src/common.cpp	2015-12-16 10:35:17.000000000 -0500
-+++ ./src/common.cpp	2015-12-17 05:09:51.542032656 -0500
-@@ -90,8 +90,12 @@
-     int trace_size = 0;
- 
-     trace_size = backtrace(trace, 32);
-+#ifdef __ANDROID__
-+    debug(0, L"Backtrace: Not available on Android");
-+#else
-     debug(0, L"Backtrace:");
-     backtrace_symbols_fd(trace, trace_size, STDERR_FILENO);
-+#endif
- }
- 
- int fgetws2(wcstring *s, FILE *f)