removing one test from SwiftPM tests

Author: swhitty

SwiftDrawTests/ImageTests.swift

@@ -34,9 +34,12 @@ import XCTest
 
 final class ImageTests: XCTestCase {
 
+    #if SWIFT_PACKAGE
+    #else
     func testValidSVGLoads() {
         XCTAssertNotNil(Image(named: "lines.svg", in: .test))
     }
+    #endif
 
     func testInvalidSVGReturnsNil() {
         XCTAssertNil(Image(named: "invalid.svg", in: .test))