code-server-flutter update/add workflows

root/etc/cont-init.d/95-apt-get

@@ -1,3 +0,0 @@
-#!/usr/bin/with-contenv bash
-
-apt-get update

root/etc/cont-init.d/98-flutter

@@ -1,16 +0,0 @@
-#!/usr/bin/with-contenv bash
-
-ARCH=$(uname -m)
-
-if [ ! -f "/flutter/bin/flutter" ]; then
-    echo "Installing Flutter"
-    apt-get install -y \
-        unzip
-    git clone https://github.com/flutter/flutter.git -b beta --depth 1 /flutter
-    ln -s /flutter/bin/flutter /usr/bin/flutter
-    flutter doctor
-    flutter config --enable-web
-    flutter config --no-analytics
-else
-    echo "Flutter already installed, skipping"
-fi