chore: remove unnecessary PHP extensions from Dockerfile

Author: ammodev

Dockerfile

@@ -18,9 +18,6 @@ RUN docker-php-ext-install exif
 RUN docker-php-ext-install zip
 RUN docker-php-ext-install ctype
 RUN docker-php-ext-install dom
-RUN docker-php-ext-install filter
-RUN docker-php-ext-install openssl
-RUN docker-php-ext-install pcre
 RUN docker-php-ext-install session
 RUN docker-php-ext-install tokenizer
 RUN docker-php-ext-install xml