Delete a bunch of NPAPI layout tests.

LayoutTests/plugins/npruntime/identifier-conversion-expected.txt

Index: LayoutTests/plugins/npruntime/identifier-conversion-expected.txt
diff --git a/LayoutTests/plugins/npruntime/identifier-conversion-expected.txt b/LayoutTests/plugins/npruntime/identifier-conversion-expected.txt
deleted file mode 100644
index 3bc72a3af3e62d3674f322b8dcbbd882b7c715e8..0000000000000000000000000000000000000000
--- a/LayoutTests/plugins/npruntime/identifier-conversion-expected.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-Test converting strings and integers to identifiers and back
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS embed.testIdentifierToString('foo') is "foo"
-PASS embed.testIdentifierToString('123') is "123"
-PASS embed.testIdentifierToString('null') is "null"
-PASS embed.testIdentifierToString(1) is undefined
-PASS embed.testIdentifierToString(-1) is undefined
-PASS embed.testIdentifierToString(1.40) is undefined
-PASS embed.testIdentifierToInt(1) is 1
-PASS embed.testIdentifierToInt(-1) is -1
-PASS embed.testIdentifierToInt(10) is 10
-PASS embed.testIdentifierToInt(10.234234) is 10
-PASS embed.testIdentifierToInt('foo') is 0
-PASS embed.testIdentifierToInt('10') is 0
-PASS successfullyParsed is true
-
-TEST COMPLETE
-