refactor: remove motion listings from compass view, keep voting discipline

Remove the '🔍 Wat bepaalt deze assen?' expander that showed individual
motion titles (➕/➖) with axis labels and variance explanation. Only the
Stemdiscipline analyse (Rice index) section remains. Also removes the
now-unused _render_axis_motions() helper function.

explorer.py

@@ -469,19 +469,6 @@ def _swap_axes(
     return projections.swap_axes(positions_by_window, axis_def)
 
 
-def _render_axis_motions(label: str, conf_pct: str, top: dict) -> None:
-    st.markdown(f"**{label}**{conf_pct}")
-    for sign, icon in (("+", "➕"), ("-", "➖")):
-        titles = top.get(sign, [])
-        if titles:
-            st.markdown(
-                "  "
-                + icon
-                + " "
-                + " · ".join(f"{t} ({d})" for t, d in titles[:3])
-            )
-
-
 @st.cache_data(show_spinner="2D posities berekenen (kan even duren)…")
 def load_positions(
     db_path: str, window_size: str = "annual"
@@ -1576,34 +1563,6 @@ def build_compass_tab(db_path: str, window_size: str) -> None:
         ):
             st.caption(_y_interp)
 
-        # Motion expander — show which motions define each axis for this window
-        x_top = axis_def.get("x_top_motions", {}).get(window_idx, {})
-        y_top = axis_def.get("y_top_motions", {}).get(window_idx, {})
-        x_conf = axis_def.get("x_label_confidence", {}).get(window_idx)
-        y_conf = axis_def.get("y_label_confidence", {}).get(window_idx)
-        evr = axis_def.get("explained_variance_ratio", [None, None])
-        evr0 = evr[0] if evr else None
-
-        _has_motion_data = bool(
-            x_top.get("+") or x_top.get("-") or y_top.get("+") or y_top.get("-")
-        )
-        if _has_motion_data:
-            with st.expander("🔍 Wat bepaalt deze assen?"):
-                x_conf_pct = (
-                    f" (vertrouwen: {x_conf:.0%})" if x_conf is not None else ""
-                )
-                y_conf_pct = (
-                    f" (vertrouwen: {y_conf:.0%})" if y_conf is not None else ""
-                )
-
-                _render_axis_motions(f"Horizontale as: {_x_label}", x_conf_pct, x_top)
-                _render_axis_motions(f"Verticale as: {_y_label}", y_conf_pct, y_top)
-
-                if evr0 is not None:
-                    st.caption(
-                        f"De sterkste component verklaart {evr0:.1%} van de variantie in stemgedrag."
-                    )
-
         # Voting discipline analysis
         st.markdown("---")
         st.markdown(