Merge #4674

4674: Remove deprecated import of loop etc at the top level of qcodes r=jenshnielsen a=jenshnielsen

- [ ] Needs a breaking change note

Co-authored-by: Jens H. Nielsen <Jens.Nielsen@microsoft.com>
Co-authored-by: Jens Hedegaard Nielsen <jenshnielsen@gmail.com>

docs/changes/newsfragments/4674.breaking

@@ -0,0 +1,2 @@
+The deprecated imports of `Loop`, `Measure` and members of `qcodes.data` in the toplevel QCoDeS namespace has been
+removed.

qcodes/__init__.py

@@ -79,43 +79,12 @@
     from qcodes.utils import QCoDeSDeprecationWarning
 
     warnings.warn(
-        "import_legacy_api config option is deprecated and will be removed "
-        "in a future release please update your imports to import these "
-        "modules directly.",
+        "`core.import_legacy_api` and `gui.plotlib` config option has no effect "
+        "and will be removed in the future. "
+        "Please avoid setting this in your `qcodesrc.json` config file.",
         QCoDeSDeprecationWarning,
     )
 
-    plotlib = config.gui.plotlib
-    if plotlib in {"QT", "all"}:
-        try:
-            from qcodes.plots.pyqtgraph import QtPlot
-        except Exception:
-            print(
-                "pyqtgraph plotting not supported, "
-                'try "from qcodes.plots.pyqtgraph import QtPlot" '
-                "to see the full error"
-            )
-
-    if plotlib in {"matplotlib", "all"}:
-        try:
-            from qcodes.plots.qcmatplotlib import MatPlot
-        except Exception:
-            print(
-                "matplotlib plotting not supported, "
-                'try "from qcodes.plots.qcmatplotlib import MatPlot" '
-                "to see the full error"
-            )
-    from qcodes.actions import BreakIf, Task, Wait
-    from qcodes.data.data_array import DataArray
-    from qcodes.data.data_set import DataSet, load_data, new_data
-    from qcodes.data.format import Formatter
-    from qcodes.data.gnuplot_format import GNUPlotFormat
-    from qcodes.data.hdf5_format import HDF5Format
-    from qcodes.data.io import DiskIO
-    from qcodes.data.location import FormatLocation
-    from qcodes.loops import Loop, active_data_set, active_loop
-    from qcodes.measure import Measure
-
 
 try:
     _register_magic = config.core.get('register_magic', False)