Remove old linting code. Add Terraform to tool versions file for asdf / mise users.

Author: mfjarvis

.flake8

@@ -1,3 +1,4 @@
 poetry 2.1.4
 nodejs 23.11.0
 python 3.11.12
+terraform 1.12.2

.tool-versions

@@ -3,20 +3,12 @@ SHELL=/usr/bin/env bash -euo pipefail
 PYTHON_PROJECT_DIRS_WITH_UNIT_TESTS = backend batch_processor_filter delta_backend filenameprocessor mesh_processor recordprocessor lambdas/ack_backend lambdas/redis_sync lambdas/id_sync lambdas/mns_subscription lambdas/shared
 PYTHON_PROJECT_DIRS = e2e e2e_batch quality_checks $(PYTHON_PROJECT_DIRS_WITH_UNIT_TESTS)
 
-.PHONY: install-python install-node install lint format format-check clean publish build-proxy release initialise-all-python-venvs update-all-python-dependencies run-all-python-unit-tests build-all-docker-images
-
-#Installs dependencies using poetry.
-install-python:
-	poetry lock --no-update
-	poetry install
+.PHONY: install lint format format-check clean publish build-proxy release initialise-all-python-venvs update-all-python-dependencies run-all-python-unit-tests build-all-docker-images
 
 #Installs dependencies using npm.
-install-node:
+install:
 	npm install --legacy-peer-deps
 
-#Condensed Target to run all targets above.
-install: install-node install-python
-
 #Run the npm linting script (specified in package.json). Used to check the syntax and formatting of files.
 lint:
 	npm run lint