Reverted change about getters in bicubic interpolation.

As discussed on the mailing list, the caller already knows the arrays as
it is the caller who provided them initially.

src/changes/changes.xml

@@ -65,11 +65,6 @@ If the output is not quite correct, check for invisible trailing spaces!
       <action dev="erans" type="add" issue="MATH-1244">
         Method "cosAngle" in "o.a.c.m.util.MathArrays".
       </action>
-      <action dev="luc" type="add" due-to="Lorenzoexe">
-        Add getXmax(), getXmin(), getYmax(), getYmin() to bicubic interpolating function.
-        These can be useful to manage an OutOfRangeException without the need to access
-        the original x and y arrays.
-      </action>
       <action dev="tn" type="fix" issue="MATH-1240"> <!-- backported to 3.6 -->
         "KolmogorovSmirnovTest#ksSum(...)" returned wrong result in case the provided
         t-parameters was zero. This affected the calculation of "approximateP(...)" for

src/main/java/org/apache/commons/math4/analysis/interpolation/BicubicInterpolatingFunction.java

@@ -184,38 +184,6 @@ public class BicubicInterpolatingFunction
         }
     }
 
-    /**
-     * Returns the minimum value of the first coordinate
-     * @return xval[0].
-     */
-    public double getXmin() {
-        return xval[0];
-    }
-
-    /**
-     * Returns the maximum value of the second coordinate
-     * @return xval[xval.length - 1].
-     */
-    public double getXmax() {
-        return xval[xval.length - 1];
-    }
-
-    /**
-     * Returns the minimum value of the second coordinate
-     * @return yval[0].
-     */
-    public double getYmin() {
-        return yval[0];
-    }
-
-    /**
-     * Returns the maximum value of the second coordinate
-     * @return yval[yval.length - 1].
-     */
-    public double getYmax() {
-        return yval[yval.length - 1];
-    }
-
     /**
      * @param c Coordinate.
      * @param val Coordinate samples.

src/test/java/org/apache/commons/math4/analysis/interpolation/BicubicInterpolatingFunctionTest.java

@@ -160,12 +160,7 @@ public final class BicubicInterpolatingFunctionTest {
         try {
             bcf.value(x, y);
             Assert.fail("OutOfRangeException expected");
-        } catch (OutOfRangeException expected) {
+        } catch (OutOfRangeException expected) {}
-            Assert.assertEquals(xMin, bcf.getXmin(), 1.0e-15);
-            Assert.assertEquals(xMax, bcf.getXmax(), 1.0e-15);
-            Assert.assertEquals(yMin, bcf.getYmin(), 1.0e-15);
-            Assert.assertEquals(yMax, bcf.getYmax(), 1.0e-15);
-        }
 
         x = xMin;
         y = yMax + small;
@@ -174,12 +169,7 @@ public final class BicubicInterpolatingFunctionTest {
         try {
             bcf.value(x, y);
             Assert.fail("OutOfRangeException expected");
-        } catch (OutOfRangeException expected) {
+        } catch (OutOfRangeException expected) {}
-            Assert.assertEquals(xMin, bcf.getXmin(), 1.0e-15);
-            Assert.assertEquals(xMax, bcf.getXmax(), 1.0e-15);
-            Assert.assertEquals(yMin, bcf.getYmin(), 1.0e-15);
-            Assert.assertEquals(yMax, bcf.getYmax(), 1.0e-15);
-        }
     }
 
     /**