configure: remove cpu clips tests

we are no longer compiling libsamplerate so they are unneccesary

mythtv/configure

@@ -2005,8 +2005,6 @@ MYTHTV_CONFIG_LIST='
 
 MYTHTV_HAVE_LIST='
     byteswap_h
-    cpu_clips_negative
-    cpu_clips_positive
     fe_can_2g_modulation
     ftime
     getifaddrs
@@ -5598,57 +5596,6 @@ if ! disabled network; then
     fi
 fi
 
-# "CPU_CLIP" test for SRC / libsamplerate
-# test positive wrap
-check_exec -lm << EOF && enable cpu_clips_positive
-    #define _ISOC9X_SOURCE  1
-    #define _ISOC99_SOURCE  1
-    #define __USE_ISOC99    1
-    #define __USE_ISOC9X    1
-    #include <math.h>
-    int main (void)
-    {	double	fval ;
-        int k, ival ;
-
-        fval = 1.0 * 0x7FFFFFFF ;
-        for (k = 0 ; k < 100 ; k++)
-        {
-            ival = (lrint (fval)) >> 24 ;
-            if (ival != 127)
-                return 1 ;
-
-            fval *= 1.2499999 ;
-        } ;
-
-        return 0 ;
-    }
-EOF
-
-# test negative wrap
-check_exec -lm << EOF && enable cpu_clips_negative
-    #define	_ISOC9X_SOURCE	1
-    #define _ISOC99_SOURCE  1
-    #define __USE_ISOC99    1
-    #define __USE_ISOC9X    1
-    #include <math.h>
-    int main (void)
-    {
-        double	fval ;
-        int k, ival ;
-
-        fval = -8.0 * 0x10000000 ;
-        for (k = 0 ; k < 100 ; k++)
-        {
-            ival = (lrint (fval)) >> 24 ;
-            if (ival != -128)
-                return 1 ;
-
-            fval *= 1.2499999 ;
-        } ;
-
-        return 0 ;
-    }
-EOF
 require_pkg_config samplerate samplerate samplerate.h src_get_version -lm
 
 # required to compile inline sse with some compilers