[SPARK-19810][BUILD][CORE] Remove support for Scala 2.10

## What changes were proposed in this pull request?

- Remove Scala 2.10 build profiles and support
- Replace some 2.10 support in scripts with commented placeholders for 2.12 later
- Remove deprecated API calls from 2.10 support
- Remove usages of deprecated context bounds where possible
- Remove Scala 2.10 workarounds like ScalaReflectionLock
- Other minor Scala warning fixes

## How was this patch tested?

Existing tests

Author: Sean Owen <sowen@cloudera.com>

Closes #17150 from srowen/SPARK-19810.

2 files changed, 11 insertions, 11 deletions

diff --git a/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Matrices.scala b/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Matrices.scala
index 07f3bc2728..66c5362441 100644
--- a/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Matrices.scala
+++ b/mllib-local/src/main/scala/org/apache/spark/ml/linalg/Matrices.scala
@@ -856,7 +856,7 @@ object SparseMatrix {
     var prevRow = -1
     var prevVal = 0.0
     // Append a dummy entry to include the last one at the end of the loop.
-    (sortedEntries.view :+ (numRows, numCols, 1.0)).foreach { case (i, j, v) =>
+    (sortedEntries.view :+ ((numRows, numCols, 1.0))).foreach { case (i, j, v) =>
       if (v != 0) {
         if (i == prevRow && j == prevCol) {
           prevVal += v
diff --git a/mllib-local/src/test/scala/org/apache/spark/ml/linalg/MatricesSuite.scala b/mllib-local/src/test/scala/org/apache/spark/ml/linalg/MatricesSuite.scala
index 9f82020868..7fb9034d65 100644
--- a/mllib-local/src/test/scala/org/apache/spark/ml/linalg/MatricesSuite.scala
+++ b/mllib-local/src/test/scala/org/apache/spark/ml/linalg/MatricesSuite.scala
@@ -633,22 +633,22 @@ class MatricesSuite extends SparkMLFunSuite {
       dnMap.put((i, j), value)
     }
     assert(dnMap.size === 6)
-    assert(dnMap(0, 0) === 1.0)
-    assert(dnMap(1, 0) === 2.0)
-    assert(dnMap(2, 0) === 0.0)
-    assert(dnMap(0, 1) === 0.0)
-    assert(dnMap(1, 1) === 4.0)
-    assert(dnMap(2, 1) === 5.0)
+    assert(dnMap((0, 0)) === 1.0)
+    assert(dnMap((1, 0)) === 2.0)
+    assert(dnMap((2, 0)) === 0.0)
+    assert(dnMap((0, 1)) === 0.0)
+    assert(dnMap((1, 1)) === 4.0)
+    assert(dnMap((2, 1)) === 5.0)
 
     val spMap = MutableMap[(Int, Int), Double]()
     sp.foreachActive { (i, j, value) =>
       spMap.put((i, j), value)
     }
     assert(spMap.size === 4)
-    assert(spMap(0, 0) === 1.0)
-    assert(spMap(1, 0) === 2.0)
-    assert(spMap(1, 1) === 4.0)
-    assert(spMap(2, 1) === 5.0)
+    assert(spMap((0, 0)) === 1.0)
+    assert(spMap((1, 0)) === 2.0)
+    assert(spMap((1, 1)) === 4.0)
+    assert(spMap((2, 1)) === 5.0)
   }
 
   test("horzcat, vertcat, eye, speye") {