Revert "Backport "Fix #8544: Parse the correct schema version from ma…

…nifest" (#8587)"

This reverts commit 48ba14c.

core/dbt/contracts/graph/manifest.py

@@ -1510,15 +1510,7 @@ def get_manifest_schema_version(dct: dict) -> int:
     schema_version = dct.get("metadata", {}).get("dbt_schema_version", None)
     if not schema_version:
         raise ValueError("Manifest doesn't have schema version")
-
-    # schema_version is in this format: https://schemas.getdbt.com/dbt/manifest/v10.json
-    # What the code below is doing:
-    # 1. Split on "/" – v10.json
-    # 2. Split on "." – v10
-    # 3. Skip first character – 10
-    # 4. Convert to int
-    # TODO: If this gets more complicated, turn into a regex
-    return int(schema_version.split("/")[-1].split(".")[0][1:])
+    return int(schema_version.split(".")[-2][-1])
 
 
 def _check_duplicates(value: BaseNode, src: Mapping[str, BaseNode]):

tests/functional/artifacts/test_previous_version_state.py

@@ -1,12 +1,9 @@
-import json
+import pytest
 import os
 import shutil
-
-import pytest
-
-from dbt.contracts.graph.manifest import WritableManifest, get_manifest_schema_version
-from dbt.exceptions import IncompatibleSchemaError
 from dbt.tests.util import run_dbt, get_manifest
+from dbt.exceptions import IncompatibleSchemaError
+from dbt.contracts.graph.manifest import WritableManifest
 
 # This project must have one of each kind of node type, plus disabled versions, for
 # test coverage to be complete.
@@ -354,13 +351,3 @@ def test_nonbackwards_compatible_versions(self, project):
         # schema versions 1, 2, 3 are all not forward compatible
         for schema_version in range(1, 4):
             self.compare_previous_state(project, schema_version, False)
-
-    def test_get_manifest_schema_version(self, project):
-        for schema_version in range(1, self.CURRENT_EXPECTED_MANIFEST_VERSION):
-            manifest_path = os.path.join(
-                project.test_data_dir, f"state/v{schema_version}/manifest.json"
-            )
-            manifest = json.load(open(manifest_path))
-
-            manifest_version = get_manifest_schema_version(manifest)
-            assert manifest_version == schema_version