removed unused extractor (JsonTokenExtractor handles this)

src/main/java/org/scribe/extractors/FoursquareAccessTokenExtractor.java

@@ -1,28 +0,0 @@
-package org.scribe.extractors;
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import org.scribe.exceptions.OAuthException;
-import org.scribe.extractors.TokenExtractor20Impl;
-import org.scribe.model.Token;
-import org.scribe.utils.Preconditions;
-import org.scribe.utils.URLUtils;
-
-public class FoursquareAccessTokenExtractor extends TokenExtractor20Impl {
-
-    private static final String TOKEN_REGEX = ".[\\s]+\"access_token\":\"(\\S*?)(&(\\S*))?\"[\\s]+.";
-    private static final String EMPTY_SECRET = "";
-
-    public Token extract(String response) {
-        Preconditions.checkEmptyString(response, "Response body is incorrect. Can't extract a token from an empty string");
-
-        Matcher matcher = Pattern.compile(TOKEN_REGEX).matcher(response);
-        if (matcher.matches()) {
-            String token = URLUtils.formURLDecode(matcher.group(1));
-            return new Token(token, EMPTY_SECRET);
-        } else {
-            throw new OAuthException("Response body is incorrect. Can't extract a token from this: '" + response + "'", null);
-        }
-    }
-}