fixed redis php extension instalation bug

remove unnecessary RUN command

Author: StanislavKnysh

php-fpm/Dockerfile-70

@@ -66,7 +66,7 @@ RUN if [ ${INSTALL_XDEBUG} = true ]; then \
 ARG INSTALL_PHPREDIS=false
 RUN if [ ${INSTALL_PHPREDIS} = true ]; then \
     # Install Php Redis Extension
-    RUN pecl install -o -f redis \
+    pecl install -o -f redis \
     &&  rm -rf /tmp/pear \
     &&  docker-php-ext-enable redis \
 ;fi