remove unused functions

app.py

@@ -14,11 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import base64
 import traceback
 
 import gradio as gr
-import cv2
 
 from paddlenlp import Taskflow
 from paddlenlp.utils.doc_parser import DocParser
@@ -125,21 +123,6 @@ def process_upload(file):
             None,
         )
 
-
-def BGR2RGB(img):
-    pilimg = img.copy()
-    pilimg[:, :, 0] = img[:, :, 2]
-    pilimg[:, :, 2] = img[:, :, 0]
-    return pilimg
-
-
-def np2base64(image_np):
-    image_np = BGR2RGB(image_np)
-    image = cv2.imencode('.jpg', image_np)[1]
-    base64_str = str(base64.b64encode(image))[2:-1]
-    return base64_str
-
-
 def get_schema(schema_str):
     def _is_ch(s):
         for ch in s: