Delete the dead v1 hydrology settings surface

- Surface inset, terrain blend and ridge tunnel settings gone; Hydraulics keeps only waterfallMinimumDrop
- Branching folded into Routing; refinementSpacing derived from the sample lattice
- Contained surface routing branch, surface incision helpers and 13 unreachable compiler members deleted

probe/src/test/java/art/arcane/iris/probe/HydrologyPlannerProbeTest.java

@@ -23,7 +23,7 @@ public final class HydrologyPlannerProbeTest {
     }
 
     @Test
-    public void requiredCoverageExcludesTheRemovedRidgeBore() {
+    public void requiredCoverageExcludesTheUnproducedRidgeBore() {
         assertFalse(HydrologyPlannerProbe.REQUIRED_FEATURE_TYPES.contains(HydrologyFeatureType.RIDGE_BORE));
         assertEquals(
                 EnumSet.complementOf(EnumSet.of(HydrologyFeatureType.RIDGE_BORE)),