remove unnecessary ENV vraiable SWIFT_VERSION

Author: sebsto

.github/workflows/integration_tests.yml

@@ -59,7 +59,6 @@ jobs:
         # We are using only one Swift version
         swift:
           - image: ${{ inputs.matrix_linux_swift_container_image }}
-            swift_version: "6.0.3-amazonlinux2"
     container:
       image: ${{ matrix.swift.image }}
     steps:
@@ -93,7 +92,6 @@ jobs:
       - name: Run matrix job
         working-directory: ${{ github.event.repository.name }}  # until we can use action/checkout@v4
         env:
-          SWIFT_VERSION: ${{ matrix.swift.swift_version }}
           COMMAND: ${{ inputs.matrix_linux_command }}
           EXAMPLE: ${{ matrix.examples }}
         run: |

.github/workflows/scripts/integration_tests.sh

@@ -19,6 +19,7 @@ log() { printf -- "** %s\n" "$*" >&2; }
 error() { printf -- "** ERROR: %s\n" "$*" >&2; }
 fatal() { error "$@"; exit 1; }
 
+SWIFT_VERSION=$(swift --version)
 test -n "${SWIFT_VERSION:-}" || fatal "SWIFT_VERSION unset"
 test -n "${COMMAND:-}" || fatal "COMMAND unset"
 test -n "${EXAMPLE:-}" || fatal "EXAMPLE unset"