remove ldp until it is more stable

Dockerfile

@@ -28,8 +28,6 @@ RUN apk add --no-cache \
     make \
     musl \
     musl-dev \
-    openldap \
-    openldap-dev \
     openssl-dev \
     pwgen \
     py-pip \
@@ -46,7 +44,6 @@ RUN virtualenv -p python /var/lib/synapse
 RUN source /var/lib/synapse/bin/activate && \
     pip install --upgrade setuptools && \
     pip install psycopg2 && \
-    pip install python-ldap && \
     pip install https://github.com/matrix-org/synapse/tarball/$VERSION
 
 RUN apk del \
@@ -62,7 +59,6 @@ RUN apk del \
     linux-headers \
     make \
     musl-dev \
-    openldap-dev \
     openssl-dev \
     python-dev \
     sqlite-libs \