useless 'extern' and trailing whitespace removal

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@16651 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/iax2-provision.h

 /*
- * IAX Provisioning Protocol 
+ * IAX Provisioning Protocol
  *
  * Sub-information elements
  *
@@ -45,9 +45,9 @@
 #define PROV_FLAG_DIS_CIDCW		(1 << 6)	/* CID/CW Disabled */
 #define PROV_FLAG_DIS_THREEWAY	(1 << 7)	/* Three-way calling, transfer disabled */
 
-extern char *iax_provflags2str(char *buf, int buflen, unsigned int flags);
-extern int iax_provision_reload(void);
-extern int iax_provision_unload(void);
-extern int iax_provision_build(struct iax_ie_data *provdata, unsigned int *signature, const char *template, int force);
-extern int iax_provision_version(unsigned int *signature, const char *template, int force);
-extern char *iax_prov_complete_template(const char *line, const char *word, int pos, int state);
+char *iax_provflags2str(char *buf, int buflen, unsigned int flags);
+int iax_provision_reload(void);
+int iax_provision_unload(void);
+int iax_provision_build(struct iax_ie_data *provdata, unsigned int *signature, const char *template, int force);
+int iax_provision_version(unsigned int *signature, const char *template, int force);
+char *iax_prov_complete_template(const char *line, const char *word, int pos, int state);