php7: drop dependency to cgi for fpm sapi (refs #4522)

The FPM SAPI works fine without the CGI SAPI installed. It seems that
this is a copy & paste error introduced a long time ago, when FPM support
was added - and nobody noticed.
So drop the dependency now to allow smaller footprints on installations
which only use FPM.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

lang/php7/Makefile

@@ -7,7 +7,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=php
 PKG_VERSION:=7.1.9
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_MAINTAINER:=Michael Heimpold <mhei@heimpold.de>
 
@@ -133,7 +133,6 @@ endef
 
 define Package/php7-fpm
   $(call Package/php7/Default)
-  DEPENDS+= +php7-cgi
   TITLE+= (FPM)
 endef