Removed the brotli dependency

Author: pmeenan

Dockerfile

@@ -67,7 +67,6 @@ RUN apt-get update && \
     tornado \
     wsaccel \
     xvfbwrapper \
-    brotli \
     'fonttools>=3.44.0,<4.0.0' \
     marionette_driver \
     selenium \

docs/install.md

@@ -13,7 +13,6 @@ wptagent currently supports Windows, Linux and OSX for desktop browsers as well
     * ujson
     * tornado
     * wsaccel
-    * brotli
     * fonttools
     * future
     * bind9utils (Linux only, for rndc)
@@ -136,7 +135,7 @@ brew install libvpx ffmpeg imagemagick geckodriver ios-webkit-debug-proxy node g
 ```
 * Python3 and pip3 should have been installed as part of the homebrew install. The Python 3 libraries should be installed through pip3:
 ```bash
-pip3 install PyObjC ujson dnspython monotonic pillow psutil requests tornado wsaccel brotli fonttools selenium future usbmuxwrapper
+pip3 install PyObjC ujson dnspython monotonic pillow psutil requests tornado wsaccel fonttools selenium future usbmuxwrapper
 ```
 * Install lighthouse through npm
 ```bash

ubuntu_install.sh

@@ -29,13 +29,13 @@ if [ "$UBUNTU_VERSION" \< "18" ]; then
 fi
 sudo dbus-uuidgen --ensure
 if [ "$UBUNTU_VERSION" \< "20" ]; then
-    until sudo pip install dnspython monotonic pillow psutil requests tornado wsaccel xvfbwrapper brotli marionette_driver selenium future usbmuxwrapper
+    until sudo pip install dnspython monotonic pillow psutil requests tornado wsaccel xvfbwrapper marionette_driver selenium future usbmuxwrapper
     do
         sleep 1
     done
     sudo pip install 'fonttools>=3.44.0,<4.0.0'
 else
-    until sudo pip3 install dnspython monotonic pillow psutil requests tornado wsaccel xvfbwrapper brotli selenium future usbmuxwrapper
+    until sudo pip3 install dnspython monotonic pillow psutil requests tornado wsaccel xvfbwrapper selenium future usbmuxwrapper
     do
         sleep 1
     done