notify-admin-674 remove gds_metrics

Pipfile

@@ -11,7 +11,6 @@ flask = "~=2.3"
 flask-basicauth = "~=0.2"
 flask-login = "~=0.6"
 flask-wtf = "~=1.1"
-gds-metrics = {version = "==0.2.4", ref = "6f1840a57b6fb1ee40b7e84f2f18ec229de8aa72", git = "https://github.com/alphagov/gds_metrics_python.git"}
 govuk-bank-holidays = "==0.13"
 govuk-frontend-jinja = {version = "==0.5.8-alpha", git = "https://github.com/alphagov/govuk-frontend-jinja.git"}
 gunicorn = {version = "==20.1.0", extras = ["eventlet"], ref = "1299ea9e967a61ae2edebe191082fd169b864c64", git = "https://github.com/benoitc/gunicorn.git"}
@@ -19,7 +18,6 @@ humanize = "~=4.8"
 itsdangerous = "~=2.1"
 jinja2 = "~=3.1"
 notifications-python-client = "==8.0.1"
-prometheus-client = "==0.17.1"
 pyexcel = "==0.7.0"
 pyexcel-io = "==0.6.6"
 pyexcel-ods3 = "==0.6.1"

app/__init__.py

@@ -20,7 +20,6 @@ from flask_login import LoginManager, current_user
 from flask_talisman import Talisman
 from flask_wtf import CSRFProtect
 from flask_wtf.csrf import CSRFError
-from gds_metrics import GDSMetrics
 from govuk_frontend_jinja.flask_ext import init_govuk_frontend
 from itsdangerous import BadSignature
 from notifications_python_client.errors import HTTPError
@@ -128,7 +127,6 @@ from app.url_converters import (
 login_manager = LoginManager()
 csrf = CSRFProtect()
 talisman = Talisman()
-metrics = GDSMetrics()
 basic_auth = CustomBasicAuth()
 
 
@@ -198,7 +196,6 @@ def create_app(application):
         # Note, metrics purposefully first so we start measuring response times as early as possible before any
         # other `app.before_request` handlers (introduced by any of these clients) are processed (which would
         # otherwise mean we aren't measuring the full response time)
-        metrics,
         csrf,
         login_manager,
         proxy_fix,