Remove useless privacy validation (prebid#1642)

Author: And1sS

src/main/java/org/prebid/server/auction/requestfactory/AmpRequestFactory.java

@@ -183,8 +183,6 @@ private Future<BidRequest> parseBidRequest(HttpRequestContext httpRequest, Aucti
                 .ext(createExt(httpRequest, tagId, debug))
                 .build();
 
-        validateOriginalBidRequest(bidRequest, consentString, auctionContext);
-
         return Future.succeededFuture(bidRequest);
     }
 
@@ -315,30 +313,6 @@ private static Map<String, String> ampDataFromQueryString(HttpRequestContext htt
                 .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (value1, value2) -> value1));
     }
 
-    private static void validateOriginalBidRequest(
-            BidRequest bidRequest,
-            String requestConsentString,
-            AuctionContext auctionContext) {
-
-        final User user = bidRequest.getUser();
-        final ExtUser extUser = user != null ? user.getExt() : null;
-        final String gdprConsentString = extUser != null ? extUser.getConsent() : null;
-
-        final Regs regs = bidRequest.getRegs();
-        final ExtRegs extRegs = regs != null ? regs.getExt() : null;
-        final String usPrivacy = extRegs != null ? extRegs.getUsPrivacy() : null;
-
-        if (StringUtils.isAllBlank(gdprConsentString, usPrivacy)) {
-            final String message = String.format(
-                    "Amp request parameter %s or %s have invalid format: %s",
-                    CONSENT_PARAM,
-                    GDPR_CONSENT_PARAM,
-                    requestConsentString);
-            logger.debug(message);
-            auctionContext.getPrebidErrors().add(message);
-        }
-    }
-
     /**
      * Creates {@link BidRequest} and sets properties which were not set explicitly by the client, but can be
      * updated by values derived from headers and other request attributes.

src/test/java/org/prebid/server/auction/requestfactory/AmpRequestFactoryTest.java

@@ -1309,21 +1309,6 @@ public void shouldReturnBidRequestWithoutUserWhenGdprConsentQueryParamIsInvalid(
         assertThat(result.getUser()).isNull();
     }
 
-    @Test
-    public void shouldAddErrorToAuctionContextWhenGdprConsentQueryParamIsInvalid() {
-        // given
-        routingContext.queryParams().add("gdpr_consent", "consent-value");
-
-        givenBidRequest();
-
-        // when
-        final AuctionContext result = target.fromRequest(routingContext, 0L).result();
-
-        // then
-        assertThat(result.getPrebidErrors())
-                .contains("Amp request parameter consent_string or gdpr_consent have invalid format: consent-value");
-    }
-
     @Test
     public void shouldReturnBidRequestWithExtPrebidDataBiddersUpdatedByFpdResolver() throws JsonProcessingException {
         // given