Remove unnecessary permissions declaration from exercise 1, 2, 3, and 4 workflows

Author: jacobsolbergholm

.github/workflows/exercise1_workflow.yml

@@ -1,9 +1,7 @@
 name: Workflow of exercise 1
 run-name: First workflow
 
-permissions: {
-    contents: read
-}
+permissions: {}
 
 on: [push]
 

.github/workflows/exercise2_workflow.yml

@@ -1,9 +1,7 @@
 name: Workflow of exercise 2
 run-name: Second workflow
 
-permissions: {
-    contents: read
-}
+permissions: {}
 
 on:
     push:

.github/workflows/exercise3_workflow.yml

@@ -1,9 +1,7 @@
 name: Workflow of exercise 3
 run-name: Third workflow
 
-permissions: {
-    contents: read
-}
+permissions: {}
 
 on:
     push:

.github/workflows/exercise4_workflow.yml

@@ -1,9 +1,7 @@
 name: Workflow of exercise 4
 run-name: Fourth workflow
 
-permissions: {
-    contents: read
-}
+permissions: {}
 
 on:
     push: