Delete 'Dockerfile'

Dockerfile

@@ -1,15 +0,0 @@
-FROM ubuntu:16.04
-
-ENV FLUTTER_HOME ${HOME}/flutter
-ENV FLUTTER_VERSION 1.12.13+hotfix.5-stable
-
-RUN apt-get update \
-  && apt-get install -y libglu1-mesa git curl unzip wget xz-utils lib32stdc++6 \
-  && apt-get clean
-
-RUN wget https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_v${FLUTTER_VERSION}.tar.xz
-RUN cd ${HOME} & tar xf /flutter_linux_v${FLUTTER_VERSION}.tar.xz
-
-ENV PATH ${PATH}:${FLUTTER_HOME}/bin
-
-WORKDIR /