Revert "Create an old program to be used in snapshot. (#3644)"

Ref #3712. This change allowed the deno_typescript crate to reference
cli/js/lib.deno_runtime.d.ts which breaks "cargo package". We intend to
reintroduce a revised version of this patch later once "cargo
package" is working and tested.

This reverts commit 737ab94ea1bdf65eeef323ea37e84bcf430fb92c.

1 files changed, 1 insertions, 1 deletions

diff --git a/cli/js/compiler_sourcefile.ts b/cli/js/compiler_sourcefile.ts
index 8e81cdb45..087891c99 100644
--- a/cli/js/compiler_sourcefile.ts
+++ b/cli/js/compiler_sourcefile.ts
@@ -61,7 +61,7 @@ export class SourceFile {
 
   mediaType!: MediaType;
   processed = false;
-  sourceCode?: string;
+  sourceCode!: string;
   tsSourceFile?: ts.SourceFile;
   url!: string;