tests: Remove avm2/textfield_getlinetext test

The output.txt of this test was invalid,
because it skipped a carriage return after one of the lines.
This has of course something to do with the whole CR/LF/CRLF newline
madness, as the trailing CR formed a CRLF with the "real" newline
character LF, and (I suspect) git replaced it with LF ignoring
CR completely, which badly influenced the current implementation.

This test will be replaced with a proper test when
the implementation is fixed.

tests/tests/swfs/avm2/textfield_getlinetext/Test.as

@@ -1,31 +0,0 @@
-package {
-    import flash.display.Sprite;
-    import flash.text.TextField;
-    import flash.events.FocusEvent;
-
-    public class Test extends Sprite {
-        public function Test() {
-            trace("///");
-            var textField1 = new TextField();
-            textField1.text = "hello world";
-            trace(textField1.getLineText(0));
-            try {
-                trace(textField1.getLineText(1));
-            } catch (e) {
-                trace(e);
-            }
-
-            trace("///");
-            var textField2 = new TextField();
-            textField2.multiline = true;
-            textField2.text = "line 1\nline 2";
-            trace(textField2.getLineText(0));
-            trace(textField2.getLineText(1));
-
-            trace("///");
-            var textField3 = new TextField();
-            textField3.htmlText = "a <b>b</b> <i>i</i>";
-            trace(textField3.getLineText(0));
-        }
-    }
-}

tests/tests/swfs/avm2/textfield_getlinetext/output.txt

@@ -1,8 +0,0 @@
-///
-hello world
-RangeError: Error #2006: The supplied index is out of bounds.
-///
-line 1
-line 2
-///
-a b i

tests/tests/swfs/avm2/textfield_getlinetext/test.toml

@@ -1 +0,0 @@
-num_ticks = 1