Revert "feat: add Bedrock integration (BIP-0042) as separate PR"

This reverts commit 61673cd.

Author: vaquarkhan

burr/integrations/__init__.py

@@ -14,14 +14,3 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # in the License.
-
-
-def __getattr__(name: str):
-    """Lazy load Bedrock integration to avoid requiring boto3 unless used."""
-    if name == "BedrockAction":
-        from burr.integrations.bedrock import BedrockAction
-        return BedrockAction
-    if name == "BedrockStreamingAction":
-        from burr.integrations.bedrock import BedrockStreamingAction
-        return BedrockStreamingAction
-    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")