[FIX] web: remove duplicated entry in field_registry

Commit 4960453d added the field signature in field_registry.js and
in signature.js.

closes odoo/odoo#31434

Signed-off-by: =?utf-8?b?R8OpcnkgRGVib25nbmllIChnZWQp?= <ged@openerp.com>

closes odoo/odoo#31616

Signed-off-by: VincentSchippefilt <VincentSchippefilt@users.noreply.github.com>

addons/web/static/src/js/fields/field_registry.js

@@ -37,7 +37,6 @@ registry
     .add('CopyClipboardText', basic_fields.TextCopyClipboard)
     .add('CopyClipboardChar', basic_fields.CharCopyClipboard)
     .add('image', basic_fields.FieldBinaryImage)
-    .add('signature', basic_fields.FieldBinarySignature)
     .add('binary', basic_fields.FieldBinaryFile)
     .add('pdf_viewer', basic_fields.FieldPdfViewer)
     .add('monetary', basic_fields.FieldMonetary)