Removed hardcoded optimizations.

Index: configure
--- configure.orig
+++ configure
@@ -236,7 +236,6 @@ esac
 tryflag CFLAGS -pipe
 
 # Try flags to optimize binary size
-tryflag CFLAGS -O2
 tryflag CFLAGS -ffunction-sections
 tryflag CFLAGS -fdata-sections
 tryldflag LDFLAGS_AUTO -Wl,--gc-sections