Remove unused app/ui/playlist_ui.py

Big speed improvment. Loading a 540 line playlist went from 0.445s to
0.264s.

app/playlists.py

@@ -787,6 +787,9 @@ class PlaylistTab(QTableWidget):
         # Clear playlist
         self.setRowCount(0)
 
+        # Set widths
+        self._set_column_widths(session)
+
         # Get played tracks
         played_rows = self._get_played_rows(session)
 
@@ -818,9 +821,6 @@ class PlaylistTab(QTableWidget):
             if row0_item:
                 self.scrollToItem(row0_item, QAbstractItemView.ScrollHint.PositionAtTop)
 
-        # Set widths
-        self._set_column_widths(session)
-
         # Queue up time calculations to take place after UI has
         # updated
         self._update_start_end_times(session)

app/ui/playlist_ui.py

@@ -1,34 +0,0 @@
-# Form implementation generated from reading ui file 'dlg_SelectPlaylist.ui'
-#
-# Created by: PyQt6 UI code generator 6.5.3
-#
-# WARNING: Any manual changes made to this file will be lost when pyuic6 is
-# run again.  Do not edit this file unless you know what you are doing.
-
-
-from PyQt6 import QtCore, QtGui, QtWidgets
-
-
-class Ui_dlgSelectPlaylist(object):
-    def setupUi(self, dlgSelectPlaylist):
-        dlgSelectPlaylist.setObjectName("dlgSelectPlaylist")
-        dlgSelectPlaylist.resize(276, 150)
-        self.verticalLayout = QtWidgets.QVBoxLayout(dlgSelectPlaylist)
-        self.verticalLayout.setObjectName("verticalLayout")
-        self.lstPlaylists = QtWidgets.QListWidget(parent=dlgSelectPlaylist)
-        self.lstPlaylists.setObjectName("lstPlaylists")
-        self.verticalLayout.addWidget(self.lstPlaylists)
-        self.buttonBox = QtWidgets.QDialogButtonBox(parent=dlgSelectPlaylist)
-        self.buttonBox.setOrientation(QtCore.Qt.Orientation.Horizontal)
-        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.StandardButton.Cancel|QtWidgets.QDialogButtonBox.StandardButton.Ok)
-        self.buttonBox.setObjectName("buttonBox")
-        self.verticalLayout.addWidget(self.buttonBox)
-
-        self.retranslateUi(dlgSelectPlaylist)
-        self.buttonBox.accepted.connect(dlgSelectPlaylist.accept) # type: ignore
-        self.buttonBox.rejected.connect(dlgSelectPlaylist.reject) # type: ignore
-        QtCore.QMetaObject.connectSlotsByName(dlgSelectPlaylist)
-
-    def retranslateUi(self, dlgSelectPlaylist):
-        _translate = QtCore.QCoreApplication.translate
-        dlgSelectPlaylist.setWindowTitle(_translate("dlgSelectPlaylist", "Dialog"))