bug: Remove array_slice two arg variant (#14527)

In 3dfce7d I misunderstood an existing
test and accidentally added a variant of `array_slice` that accepts two
arguments. This variant is not valid and only works if one of the
arguments are null. This commit fixes the problem by removing the two
argument variant.

datafusion/functions-nested/src/extract.rs

@@ -329,11 +329,6 @@ impl ArraySlice {
         Self {
             signature: Signature::one_of(
                 vec![
-                    TypeSignature::ArraySignature(
-                        ArrayFunctionSignature::ArrayAndIndexes(
-                            NonZeroUsize::new(1).expect("1 is non-zero"),
-                        ),
-                    ),
                     TypeSignature::ArraySignature(
                         ArrayFunctionSignature::ArrayAndIndexes(
                             NonZeroUsize::new(2).expect("2 is non-zero"),

datafusion/sqllogictest/test_files/array.slt

@@ -1850,15 +1850,11 @@ select array_slice(arrow_cast(make_array(1, 2, 3, 4, 5), 'LargeList(Int64)'), 0,
 [] []
 
 # array_slice scalar function #11 (with NULL-NULL)
-query ??
+query error
 select array_slice(make_array(1, 2, 3, 4, 5), NULL), array_slice(make_array('h', 'e', 'l', 'l', 'o'), NULL);
-----
-NULL NULL
 
-query ??
+query error
 select array_slice(arrow_cast(make_array(1, 2, 3, 4, 5), 'LargeList(Int64)'), NULL), array_slice(arrow_cast(make_array('h', 'e', 'l', 'l', 'o'), 'LargeList(Utf8)'), NULL);
-----
-NULL NULL
 
 # array_slice scalar function #12 (with zero and negative number)
 query ??