Revert "thumbv6m-none-eabi tests"

This reverts commit 1d1ad7c.

Author: BjornTheProgrammer

.github/workflows/ci.yaml

@@ -51,7 +51,6 @@ jobs:
           - beta
           - nightly
           - 1.57.0  # MSRV
-          - thumbv6m-none-eabi # Non Arc target
 
     name: tests/${{ matrix.rust }}
     steps:

scripts/all-tests.sh

@@ -6,11 +6,6 @@ set -e
 FEATURES=$1
 CHANNEL=$2
 
-if [ "$CHANNEL" = "thumbv6m-none-eabi" ]; then
-    cargo build --no-default-features --features critical-section
-    exit 1;
-fi
-
 if [ "$CHANNEL" = "1.57.0" ]; then
     cargo update --package openblas-src --precise 0.10.5
     cargo update --package openblas-build --precise 0.10.5