Update Dockerfile

Dockerfile

@@ -100,12 +100,6 @@ RUN curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x99E82A7564
 # Install Scala + SBT
 RUN apt-fast update && apt-fast install -y scala sbt && rm -rf /var/lib/apt/lists/*
 
-# -----------------------------
-# PHP + Composer
-# -----------------------------
-RUN apt-fast install -y php-cli unzip \
-    && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer && rm -rf /var/lib/apt/lists/*
-
 # -----------------------------
 # Ruby
 # -----------------------------