Revert "Derive Arbitrary for various core_arch::x86 types (#348)"

This reverts commit dacc2d5.

Author: tautschnig

.github/workflows/goto-transcoder.yml

@@ -27,8 +27,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Generate contracts programs
       - name: Generate contracts

.github/workflows/kani-metrics.yml

@@ -25,9 +25,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         submodules: true
-    - name: Apply stdarch patch
-      run: cd library/stdarch && patch -p1 < ../../stdarch.patch
-
+    
     # The Kani metrics collection uses a Python script (kani_std_analysis.py), so make sure Python is installed
     - name: Set up Python
       uses: actions/setup-python@v4

.github/workflows/kani.yml

@@ -51,9 +51,7 @@ jobs:
         with:
           path: head
           submodules: true
-      - name: Apply stdarch patch
-        run: cd head/library/stdarch && patch -p1 < ../../stdarch.patch
-
+      
       # Step 2: Install jq
       - name: Install jq
         if: matrix.os == 'ubuntu-latest'
@@ -90,8 +88,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run Kani autoharness on the std library for selected functions.
       # Uses "--include-pattern" to make sure we do not try to run across all
@@ -102,8 +98,6 @@ jobs:
       # - We use >::disjoint_bitor (and >::unchecked_disjoint_bitor) as pattern
       #   as whitespace is not supported, cf.
       #   https://github.com/model-checking/kani/issues/4046
-      # - core_arch::x86::__m128d::as_f64x2 is just one example of hundreds of
-      #   core_arch::x86:: functions that are known to verify successfully.
       - name: Run Kani Verification
         run: |
           scripts/run-kani.sh --run autoharness --kani-args \
@@ -113,7 +107,6 @@ jobs:
             --include-pattern alloc::layout::Layout::from_size_align \
             --include-pattern ascii::ascii_char::AsciiChar::from_u8 \
             --include-pattern char::convert::from_u32_unchecked \
-            --include-pattern core_arch::x86::__m128d::as_f64x2 \
             --include-pattern "num::nonzero::NonZero::<i8>::count_ones" \
             --include-pattern "num::nonzero::NonZero::<i16>::count_ones" \
             --include-pattern "num::nonzero::NonZero::<i32>::count_ones" \
@@ -295,8 +288,6 @@ jobs:
         with:
           path: head
           submodules: true
-      - name: Apply stdarch patch
-        run: cd head/library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run list on the std library
       - name: Run Kani List
@@ -329,8 +320,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - name: Apply stdarch patch
-        run: cd library/stdarch && patch -p1 < ../../stdarch.patch
 
       # Step 2: Run autoharness analyzer on the std library
       - name: Run Autoharness Analyzer