strcasecmp is no longer used, so remove the compatibility code

configure.ac

@@ -99,7 +99,6 @@ AC_CHECK_FUNCS([mkdir])
 AC_CHECK_FUNCS([pow])
 AC_CHECK_FUNCS([setlocale])
 AC_CHECK_FUNCS([sqrt])
-AC_CHECK_FUNCS([strcasecmp])
 AC_CHECK_FUNCS([strchr])
 AC_CHECK_FUNCS([strdup])
 AC_CHECK_FUNCS([strerror])

src/libespeak-ng/compiledata.c

@@ -21,7 +21,6 @@
 
 #include <stdio.h>
 #include <string.h>
-#include <strings.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <time.h>
@@ -873,26 +872,6 @@ static void CompileReport(void)
 }
 
 
-#ifdef PLATFORM_WINDOWS
-int strcasecmp(const char *s1, const char *s2)
-{
-	int ix=0;
-	int diff;
-
-	for(;; )
-	{
-		if((diff = (tolower(s1[ix]) - tolower(s2[ix]))) != 0)
-			return(diff);
-
-		if((s1[ix] == 0) || (s2[ix] == 0))
-			return(diff);
-
-		ix++;
-	}
-}
-#endif
-
-
 static void error(const char *format, const char *string)
 {
 	if(string==NULL)