Revert "Install poetry via pipx"

This reverts commit 72038d2.

I thought this was the source of CI failures, but it was not

Author: dmerejkowsky

.github/workflows/doc.yml

@@ -23,8 +23,7 @@ jobs:
 
     - name: Install and configure poetry
       run: |
-        python -m pip install pipx
-        pipx install poetry
+        python -m pip install poetry
 
     - name: Prepare project for development
       run: |

.github/workflows/linters.yml

@@ -20,12 +20,11 @@ jobs:
       with:
         python-version: "3.10"
 
-    - uses: extractions/setup-just@v1
-
     - name: Install and configure poetry
       run: |
-        python -m pip install pipx
-        pipx install poetry
+        python -m pip install poetry
+
+    - uses: extractions/setup-just@v1
 
     - name: Prepare project for development
       run: |

.github/workflows/safety.yml

@@ -16,12 +16,11 @@ jobs:
 
       - name: Install and configure poetry
         run: |
-          python -m pip install pipx
-          pipx install poetry
+          python -m pip install poetry
 
       - name: Prepare project for development
         run: |
-          just setup
+          python -m poetry install
 
       - name: Run safety dependency check
         run: python -m poetry run safety check --full-report

.github/workflows/tests.yml

@@ -27,8 +27,7 @@ jobs:
 
     - name: Install and configure poetry
       run: |
-        python -m pip install pipx
-        pipx install poetry
+        python -m pip install poetry
 
     - uses: extractions/setup-just@v1
       env: